Investigation of the use of agricultural byproducts for fungal protein production
| Autor: | K. Schügerl, W. Rosen |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Fungal protein
biology business.industry food and beverages Substrate (chemistry) Bioengineering Fungus biology.organism_classification Applied Microbiology and Biotechnology Biochemistry stomatognathic diseases chemistry.chemical_compound Nutrient chemistry Fodder Agriculture Yield (chemistry) Botany Food science Cellulose business |
| Zdroj: | Process Biochemistry. 32:705-714 |
| ISSN: | 1359-5113 |
| Popis: | Cellulose and nutrient salts as well as potato pulp and potato protein liquor (PPL), were used as substrates for the cultivation of Chaetomium cellulolyticum in batch and repeated-batch operations. Using cellulose as the substrate a linear relationship existed between the rates of cell mass formation and acid production. The repeated-batch process was controlled by NaOH consumption using a simple computer model. When the production of cell mass and acid stopped because of a lack of substrate cellulose was fed into the reactor. This occurred within 10 min at which point no NaOH-feed was needed to maintain a constant pH. Repeated-batch operations yielded higher cell concentrations and productivities than batch operations. The relationship between the NaOH and H 2 SO 4 consumed, and the fungal mass concentration was complex in cultivation media containing potato pulp and PPL, because various substrates were consumed by the fungus simultaneously and successively. Therefore, for repeated-batch cultivation a constant time interval was used. Repeated-batch cultivation of the fungus on potato pulp and PPL did not yield higher cell concentrations and productivities than did batch cultivation. With the optimal pulp-to-PPL ratio a maximum specific growth rate of 0.61 h 1 was obtained. These investigations indicate, that potato pulp and PPL are well suited to fungal protein production by Chaetomium cellulolyticum for fodder supplement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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